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  • 學位論文

新型鋼造雙核心自復位斜撐構架設計與耐震試驗行為

Seismic Design and Tests of a Novel Steel Dual-Core Self-Centering Braced Frame (SCBF)

指導教授 : 周中哲

摘要


預力型自復位斜撐(SCB)是利用斜撐中的拉力構件束制斜撐中的鋼受壓構件,並在斜撐受軸拉與受軸壓下提供自復位能力,即在大變形下有回到零殘餘變形的能力。在拉力構件相同應變下,傳統雙核心自復位斜撐變形量可達兩倍傳統單核心自復位斜撐變形量(或是在相同斜撐變形量下,拉力構件額外應變減少一半),有效降低拉力構件彈性應變需求。本研究首次成功發展雙核心自復位斜撐構架,改變傳統構架在地震作用下容易產生殘餘變形,讓構架擁有自復位能力。本研究除了說明雙核心自復位斜撐構架設計流程外,並以動力分析20組地震下構架之反應,並設計及試驗兩組試體,分別為一組交錨型雙核心自復位斜撐構架及一組雙核心自復位斜撐構架,研究目的在於探討兩組雙核心自復位斜撐構架耐震行為。試驗結果顯示兩組雙核心自復位斜撐構架與理論預測相符,並在八次試驗與十四次試驗下擁有良好的穩定性與低殘餘變形之能力,兩組自復位斜撐的最大斜撐應變0.68%與0.69%分別對應最大拉力構件應變0.65%與0.67%。本研究並利用非線性靜動態三維結構分析程式PISA 3D模擬兩組雙核心自復位斜撐構架試驗行為,分析顯示與試驗結果及理論預測相符,證明雙核心自復位斜撐構架可利用非線性靜動態三維結構分析程式PISA 3D進行研究與設計。

並列摘要


Self-Centering Brace (SCB) uses tendons to constrain steel compression member of the brace and provides self-centering properties under brace in tension and compression that is restored to zero residual deformation. Conventional dual-core SCB has two times brace deformation capacity than conventional single-core SCB under same strain of tendons (or reduce to half the additional strain of tendons under same brace deformation capacity) that effectively reduce the elastic strain demand of tendons. This is the first study develop Self-Centering Brace Frame (SCBF) successfully that change the large residual deformation of conventional frame system under earthquake, SCBF provides self-centering properties under brace in tension and compression that is restored to small residual deformation. The objective of research was to compare the seismic performance of two SCBF. Test results indicate that the mechanism of SCBF1 and SCBF2 are consistent with prediction. After 8 tests and 14 tests, the SCBF 1 and SCBF 2 performed small residual deformation and stable. Maximum brace strain of two SCBs were 0.68% and 0.69% corresponding to maximum tendons strain 0.65% and 0.67%. This work study also uses the Platform of Inelastic Structural Analysis for 3D System software (PISA 3D) to analyze the test behavior of SCBF 1 and SCBF 2 and also compare with the test results and predictions which are proved similar. The analysis results shows SCBF can use PISA 3D software to do parametric study and design.

參考文獻


35. 鍾秉庭(2012)「交錨型雙核心自復位斜撐及核心更換型挫屈束制斜撐之耐震行為」,碩士論文指導教授:周中哲,國立台灣大學土木工程系。
36. 陳映全(2011)「雙核心自復位消能斜撐之發展與驗證」,碩士論文指導教授:周中哲,國立台灣大學土木工程系。
40. 陳映全(2011)「雙核心自復位消能斜撐之發展與驗證」,碩士論文指導教授:周中哲,國立台灣大學土木工程系。(in Chinese)
5. Chou C-C, Chen Y-C (2013). “Development of Steel Dual-Core Self-Centering Braces: Quasi-Static Cyclic Tests and Finite Element Analyses” Earthquake Spectra, (doi: http://dx.doi.org/10.1193/082712EQS272M, available online September 6, 2013)
1. AISC (American Institute of Steel Construction). Seismic provisions for structural steel buildings. Chicago, IL. 2010.

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